Debian 服务器具有eth0, eth1. eth2，ppp0设备：
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether xx:yy:zz:yy:xx:yy brd ff:ff:ff:ff:ff:ff
3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether xx:yy:zz:yy:xx:yy brd ff:ff:ff:ff:ff:ff
4: eth2: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN qlen 1000
link/ether xx:yy:zz:yy:xx:yy brd ff:ff:ff:ff:ff:ff
63: ppp0: <POINTOPOINT,MULTICAST,NOARP,UP,LOWER_UP> mtu 1492 qdisc pfifo_fast state UNKNOWN qlen 3
link/ppp
到处都启用转发：
/proc/sys/net/ipv6/conf ~
all/forwarding=1 default/forwarding=1
eth0/forwarding=1 eth1/forwarding=1
eth2/forwarding=1 ppp0/forwarding=1
并且 autoconf 也被激活：
/proc/sys/net/ipv6/conf …